newid() inside sql server function

Question

I have to insert a fake column at the result of a query, which is the return value of a table-value function. This column data type must be unique-identifier. The best way (

Answer 1

You can pass NEWID() as a parameter to your function.

CREATE FUNCTION SOMEIDFUNCTION
(
    @NEWID1 as varchar(36), @NEWID2 as varchar(36)
)
RETURNS varchar(18)
AS
BEGIN
    -- Do something --
    DECLARE @SFID varchar(18)
    SELECT @SFID = 'DYN0000000' + LOWER(LEFT(@NEWID1,4)) + LEFT(@NEWID2,4) 
    RETURN @SFID
END
GO

Call the function like this;

SELECT dbo.SOMEIDFUNCTION(NewID(),NewID())